Journal of Dental Research, Vol 55, 142-147, Copyright © 1976 by International & American Associations for Dental Research Online Journals
Examination of the test for compressive strength applied to zinc oxide eugenol cements
A. D. Wilson
The distribution of compressive strength results for a zinc oxide eugenol
cement is negatively skewed. However, removal of a small number of outlying
low results converts the distribution to a normal one. Crosshead speed and
friction at the anvil have no significant effect on results, but
compressive strength is a function of the diameter-length ratio of the
cylinder and increases with this ratio.